Attach files. Sometimes I would find useful to attach files (.pdf, .doc, .jpg) to a given event. For example, when I get a deadline for a submission and an associated PDF file detailing all the requirements, I would very much like to "attach" it to the event entry in Orage. (When I say attach, I more likely mean for Orage to store the path to that file and Open it with xdg-open upon request.) Same holds for conferences, etc.